Question about Cars & Trucks

1 Answer

Bronco stalls in reverse

I have a 1991 ford bronco i just changed the transmission filter and and fluid out and now it stalls in reverse, goes into forward gears fine and drives fine, only stalls in reverse? will go backwards if i rev motor above 1800 rpms, but stalls at idle?

Posted by on

  • Rob getz Nov 07, 2012

    Transmission is slipping, It will have to be rebuilt.

×

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Top Expert:

    An expert who has finished #1 on the weekly Top 10 Fixya Experts Leaderboard.

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

  • Cars & Trucks Master
  • 75,130 Answers

This problem is commonly caused by a dirty automatic idle speed control valve and throttle valve but always run a OBD2 fault code as well as the cleaning procedure. Buy a can of throttle valve cleaner (do not use carburetor spray cleaner!) from NAPA or Carquest (made by CRC chemicals) and spray it into the air intake while the engine is running, use up about 1/2 the can, engine will try to stall hold the speed up, shut it down and let it soak for 30 minutes, restart and blow out the remaining fluid, shut it down and disconnect the negative battery cable for 5 Min's to reset the base idle control. If the above cleaning doesn't cure your issues you need to have the computer controlled automatic idle speed control system diagnosed and repaired by a dealer or electronic engine control repair shop.

Posted on Nov 07, 2012

3 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Molson02536
  • 3854 Answers

SOURCE: 2004 silverado tranny acting up starting w/ 2nd

Before guessing at transmission problems, check the fluid level (car warmed up, engine running in Park on level ground) and have the PCM scanned for trouble codes FIRST.

Also note that many problems that show up as transmission issues are actually PCM or electrical, and may be external to the transmission.

Secondly, put a line pressure gauge ($55 shipped on Ebay, or visit a local trans shop) on the pressure test port and go for a drive to verify proper line pressure. Base pressure at idle in P,N,OD should be around 70psi and around 140psi in R. Max line pressure should be at least 190psi at WOT in 1st or 2nd, 225psi is optimum. If base pressure is low, trans or pump is worn out. If max pressure is low, check EPC solenoid. If reverse is slow to engage, and line pressure does not come up to at least 130psi in reverse, replace the boost valve with a Transgo 0.500" boost valve (easy fix in pan).

1-2 shift does not happen at WOT until you let off the gas: Best case: try replacing the TPS. Middle case: leak in the 2nd gear apply circuit (servo assembly or 1-2 accumulator). Double check by using the pressure gauge and watch for a big drop when the PCM commands 2nd gear. Worst case: poor line pressure rise.

1-2 Shift shudder at WOT; delayed or abnormal 1-2 shift; There's a problem ONLY on the 1-2 shift: 1-2 accumulator piston cracked or stuck cocked in the bore. Check the yellow spring inside the accumulator housing for breakage. Also, if the accumulator housing walls are scored, the housing must be replaced. Easy fix in the pan.

1-2 shift is delayed and harsh, may not shift into OD: Check TPS for smooth and linear electrical response over the entire range of motion. If not, replace.

Soft shifting, gradual performance degradation: Poor line pressure rise due to leaking boost valve, clogged EPC filter screen, failing EPC solenoid, or worst case: leaky seals throughout. Transgo HD2-C kit fixes first two without removing trans. Seal restorer may fix last problem, but probably R&R. Also try a transmission flush with BG brand products (Firestone stocks it).

Here are the common things that may be happening to your transmission to what you have described. As for your transmission fluid being burn, that is a sign that your transmission is slipping. Your going to have to service the transmission again fluid and filter changed. Since your doing that you may want to replace the boost valve and shift servo. I did mine on my 4L60E and have over 365,000 miles so far, replacing the boost valve every 60,000 mile and it's only $45.00 and take less the 5 min to replace and the servo is around the same price. I did do the upgrade and have the corvette boost valve and servo in my transmission which helps a lot. The other thing to is B&M has a electronic shift controlled modulator you can install your self which would give you 3 settings and works great with the upgrades mentioned above.

Good luck and hope this helps, keep me posted and try not to run the transmission too long with the burnt and dirty fluid. The dirt in the fluid will cause the electronic pressure control (EPC) valve to fail and will end up causing a $2,300.00 total transmission rebuilt over a simple $190.00 up grade and maintenance.


Posted on Jan 02, 2010

dttech
  • 4803 Answers

SOURCE: my dodge dakota it idles

It is actually hard to say without actually seeing the vehicle, but the target speed for your engine idle is around 750 RPM. The stalling after revving kind of depends on how high you are revving it and whether the engine is at operating temperature or not. This may be normal. Then again, it could be that the Idle Air Control (IAC) is not working properly.

The shifting from first to second at 4000 RPM sounds like a completely separate problem. This could be due to low transmission fluid level, sticking shift control solenoids, or possibly even a malfunctioning Vehicle Speed Sensor.

If the Check Engine light is on, have that checked first.

Posted on Feb 18, 2011

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

88 bronco 2 automatic v6 will sometimes not go in any gear but if I'm lucky it will kick in and go can anyone tell me the problem


the problem was changing that fluid! rarely happen, but it will happen when people change transmission fluid on older car then the car messed up. when you change the fluid you washed all the friction material on the clutch surface by putting in new fluid.

Jan 23, 2014 | 1988 Ford Bronco II

1 Answer

My '96 Ford Escort (automatic transmission) cranks and idles fine it will shift and move well in reverse but when i shift down to drive it will buck and stall. Could this be a motor mount issue?


check fluid levels and add if low.. look for contaminates in fluid.. sholud be reddish color instead of brownish.. may need trans fluid/filter change..

Dec 15, 2013 | 1996 Ford Escort 4 Door

1 Answer

1989 ford bronco C6 transmission leaking fluid at manual shaft


I have a 1989 Ford Bronco 351 w with a C-6 Transmission. I just did a transmission service, replacing the gasket and filter. Now my transmission is leaking when the bronco sits for a few days.Help!!!

Aug 08, 2012 | Ford Bronco Cars & Trucks

1 Answer

Transmission goes forward in reverse,neutral,actuall in all gears except park tranmission control solenoid has been changed


You have a serious mechanical failure in the transmission, it will need to be rebuilt or replaced.

Jun 01, 2012 | Cars & Trucks

1 Answer

I put my transmission in reverse and nothing happens until I give it a little gas then it catches, it kind of feels like it has a stall converter for reverse. Any suggestions?


i have seen this before...u need a new transmission...its called a delayed engaugement ...i am sorry for the bad news...thses transmissions r problems... its called a cd4e transmission....u may be able to have the transmission filter an fluid changed but i have not had much luck in repairing that prob when changing the fluid but for how much these transmissions cost it is worth a try....they cost around 3000 to 3700 installed

Jul 18, 2011 | 2003 Ford Escape

2 Answers

Transmission leak in a 1991 ford bronco. trani fluid all over most of the engine. can't tell where it's coming from. Main puddle is under the radator.


I would say transmission cooling lines cracked or loose near or at the radiator, If so get the lines from any auto parts they should be 1/4, 5/16, or 3/8 screw the right one into the radiator tank and cut the lines to fit and use a compression union to put them together

Nov 23, 2010 | 1991 Ford Bronco

2 Answers

1991 Ford Bronco Stalls when put in drive


could be torque convertor valve or sticking valve in transmition, best get mechanic to check it out

Apr 24, 2010 | 1991 Ford Bronco

1 Answer

1987 bronco 2


Try changing the transmission filter and fluid, especially if it smells burnt, unless you have changed them recently. You really should change the filter (some people don't), to be sure fluid is getting up into the trans. Make sure you use the recommended fluid, not one that says on the label that it will work in all these different transmissions. Your trans dipstick will probably tell you what kind to use.

Aug 30, 2009 | 1987 Ford Bronco II

2 Answers

Have an 89 Bronco II automatic 4x4. Reverse


Yes......Don't change one without the other. BOTH.

Aug 15, 2009 | 1989 Ford Bronco II

1 Answer

How to replace transmission fluid on 1993 ford Bronco XLT?


Bottom pan has to come off. Grab a gasket , if none available, silicone designed specifically for that use, not just any old silicone. Do filter while your at it. Pay special attention to way filter comes off, so it goes back on same way.

Jul 12, 2009 | 1993 Ford Bronco

Not finding what you are looking for?
Cars & Trucks Logo

Related Topics:

248 people viewed this question

Ask a Question

Usually answered in minutes!

Top Cars & Trucks Experts

yadayada
yadayada

Level 3 Expert

75117 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22095 Answers

Randy Ohler

Level 3 Expert

14585 Answers

Are you a Car and Truck Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...